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Digital-to-Analog

Features and Benefits

DAC 12-bit, 256 KSps, 250 nm DAC

• Up to 256 KSps sampling rate
• Differential analog output
• 2.5 V analog and digital supply
• Signal-to-noise: 71 dB at 125 kHz input
• Signal-to-noise and distortion: 70 dB at 125 kHz input
• 0.25 μm (250 nm) CMOS process
• 0.50 mm² area

Ridgetop’s 2.5 V supply, 12-bit, 256 KSps DAC uses a fully segmented, thermometer-coded current-steering architecture. Ridgetop’s architecture is proven in silicon for rigorous applications.

Features and Benefits

Download an overview. [PDF]

DAC 16-Bit, 100 KSps, TSMC 250 nm IP Core

• 16 bits of resolution (14-bit accuracy)
• 100 KSps sampling rate
• Second-order digital delta-sigma modulator
• TSMC 250 nm mixed-signal process
• 3.0-3.6 V analog supply voltage
• 2.25-2.75 V digital supply voltage
• Area 0.8 mm²
• Signal-to-noise: 94 dB at 50 kHz
• Signal-to-noise and distortion: 92 dB at 50 kHz Input

Ridgetop’s audio DAC uses delta-sigma architecture. As shown in the illustration below, the DAC uses a digital interpolation filter, a digital second-order delta-sigma modulator, and a 32-tap analog reconstruction filter FIR. A fourth-order modulator is available to decrease oversampling ratio if the application requires. Applications for this core include audio commercial electronics, industrial control, and automotive.